Verrill, 1866
Genera: Four genera are found in the shallow waters of the Indo-West Pacific:
Genus Hydnophora Hydnophora exesa (1) ,
Genus Merulina Merulina amplicata (1) ,
Genus Paraclavarina Paraclavarina triangularis (1) ,
Genus Scapophyllia Scapophyllia cylindrica.
Description: Colonies massive (Hydnopora), encrusting (Hydnopora), Foliaceous (Merulina), or branched (Hydnopora, Paraclavarina, Scapophyllia).